Measurement of buffer requirement trends for real time traffic over TCP

Cocker, Etuate; Ghazzi, Firas; Speidel, Ulrich; Dong, Min; Wong, Vincent W. S.; Vinck, A. J. Han; Yamamoto, Hirosuke; Yokoo, H.; Morita, Hiroyuki; Ferreira, H.C.; Emleh, A.; McFadzien, R.; Palelei, S.; Eimann, R.

doi:10.1109/hpsr.2014.6900891

Cited by 8 publications

(3 citation statements)

References 19 publications

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“…Jitter is considered as one of the key statistics for characterizing the temporal performance on a network, it is defined as the absolute value of the difference between the forwarding delays of two consecutive packets [19]. Excessive jitter could cause the end node buffer to overflow or underflow.…”

Section: Delay Jittermeasurementmentioning

confidence: 99%

Developing AL-ARQ Module for Automatic Measurement of One-Way Data Transmission Delay

Lamri

Kaisina

Vasiliev

et al. 2020

Vestn. IžGTU im. M.T. Kalašnikova

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В мобильных самоорганизующихся сетях часто наблюдаются задержки при передаче потоковых данных и снижение QoS. В статье представлен разработанный модуль для измерения задержки и джиттера. Модуль встроен в программу автоматического запроса повторной передачи прикладного уровня (AL-ARQ). Для оценки эффективности работы модуля была собрана сеть, состоящая из узла-источника (микрокомпьютер RaspberryPi) и узла-получателя (ноутбук HP). С узла-источника отправлялось потоковое видео к узлу-получателю с использованием беспроводного стандарта 802.11g. Для синхронизации времени между устройствами применялся NTP-сервер.Результаты эксперимента показали эффективность предложенного модуля для измерения задержки и джиттера при передаче потоковых данных. При исследовании работы модуля было выявлено, что механизмы повторной передачи AL-ARQ влияют как на максимальное значение задержек при передаче, так и на среднее значение за время всей передачи. Был сделан вывод, что снижению уровня задержек и общему улучшению QoS может способствовать адаптивный буфер.

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Section: Delay Jittermeasurementmentioning

confidence: 99%

Developing AL-ARQ Module for Automatic Measurement of One-Way Data Transmission Delay

Lamri

Kaisina

Vasiliev

et al. 2020

Vestn. IžGTU im. M.T. Kalašnikova

View full text Add to dashboard Cite

show abstract

“…In the work of Hwang et al, both TCP and UDP transport of different traffic types. The effects of TCP transport for real‐time media are experimentally analyzed in the work of Cocker et al with a special focus on buffer sizes. In the work of Satoda et al, the authors propose an experimental method, that relying on multiplexing packets over several TCP connections, improves traffic performance.…”

Section: Related Work and Motivationmentioning

confidence: 99%

Encapsulation of real‐time IoT CoAP traffic

Herrero

2018

Trans Emerging Tel Tech

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The Constrained Application Protocol (CoAP) has been instrumental to the deployment of wireless sensors and actuators in Internet of Things low‐power low‐rate networks. Typically, a large number of such devices interact with a single gateway that routes traffic to servers where complex processing is performed. CoAP provides a highly efficient end‐to‐end mechanism that relies on the User Datagram Protocol for transport, and it is characterized by both low throughput and low latency. Because Internet firewalls typically filter User Datagram Protocol traffic as it traverses from gateways to servers, the use of Transmission Control Protocol (TCP) encapsulation becomes a viable alternative. This solution, however, is negatively affected by network packet loss that, due to TCP inherent retransmissions, severely degrades latency, reducing system responsibility. In this paper, we analyze the effect of TCP‐encapsulated CoAP and propose a mechanism that overcomes these limitations without having to change network topologies or modifying protocol functionality.

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“…In [15], both TCP and UDP transport of speech traffic is experimentally compared for different codecs. The effects of TCP transport for real‐time media, both speech and video, are experimentally analysed in [16] with a special focus on buffer sizes. In [17], Satoda et al .…”

Section: Related Work and Motivationmentioning

confidence: 99%

Analytical model of stream transported media

Herrero

St-Pierre²

2017

IET Networks

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For transmission of packetised media, real-time communications rely on the real-time protocol (RTP). RTP traffic, however, is transmitted over datagram-based transport that allows fast delivery of media. Internet firewalls are typically configured to allow web friendly traffic that uses stream-based transport instead and, simultaneously as security measure, reject any other type of transport. A mechanism to overcome this limitation is by switching transport such that media frames that would be rejected by firewalls are transmitted on top of stream transport. In this study, a novel mathematical model that links application layer packet loss to bursty network packet loss in the context of fading channels characteristic of wireless communications is presented for both, datagram and stream transport. This model is compared with experimental scenarios applied to state-of-the-art speech codecs in order to obtain quality scores that can be correlated against theoretical loss probabilities.

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Measurement of buffer requirement trends for real time traffic over TCP

Cited by 8 publications

References 19 publications

Developing AL-ARQ Module for Automatic Measurement of One-Way Data Transmission Delay

Developing AL-ARQ Module for Automatic Measurement of One-Way Data Transmission Delay

Encapsulation of real‐time IoT CoAP traffic

Analytical model of stream transported media

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